Sawing-machine.



D. A, KENNEDY.

SAWING MACHINE.

APPLICATION FILED JULY 27, 1907.

Patented July 6, 1909.

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SAWING MACHINE."

APPLIOATION FILED JULY 27; 1907.

Patented Jul 6, 1909.

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D. A. KENNEDY. SAWING MACHINE.

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1). A. KENNEDY.

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MW. I. GIMAII cu. Pwmmmm VIASNING DONALD A. KENNEDY, OF ASHLAND, WISGONSIN.

SAWING-MAOHINE Specification of Letters Patent.

Application filed July 27, 1907.

Patented July 6, 1909.

Serial No. 385,874.

T all whom it may concern:

lie it known that I, DONALD A. KENNEDY, a. citizen of the United States,and resident of Ashland, in the county of Ashland and State of\Visconsin, have invented certain new and. useful llnqn'ovements inSawingh lachines; and I do .hereby declare that the following is a full,clear, and exact description thereof.

The .improvements consist in what is herein shown, described andclaimed; the object of the invention being to provide simple, economicaland highly eliicient horizontal halal-sawing machines in which a reciproeating carriage is provided with automatic chucking and adjusting meansabove and below the cutting plane of the saw, for the purpose of holdinground logs, or irregular bodies of timber, or any section thereof whilesame is being sawed. in any form desired, the saw for this purposehaving both edges thereof toothed, in order that a cut may be madeincidental to the movement of the reciprocated carriage of the machinein ci ther direction.

Figure 1 of the accompanying drawings represents a plan view of asawinganachine embodying my improvements, Fig. 2, a detail of same, Fig.3, a transverse section view of the machine 011 the plane indicated byline in Fig. 1, including the bandsaw wheels and a supporting arch forsame, Fig. 4t, a longitudinal section view of the machine on the planeindicated by line 4t-4t in Fig. 1, Fig. 5, a plan View of the machinepartly in horizontal section, a swing-table portion of said machine andchuck-bars be ing detached, Fig. (3, a partly sectional View of apawl-and-ratchet detail of the machine on the plane indicated by line6-45 in Fig. 3, Fig. 7, a transverse section view of the machine on theplane indicated by line 77 in Fig. 4t, a cross-piece of thereciprocative carriage of said machine being broken in this view, Fig.8, a plan view of a fragment of the machine illustrating another form ofmeans for chuckin and supporting material above the saw when a tableconstituting part of said machine is employed to chuck material againstknees of a carriage below said saw, and Fig. S), a transverse sectionalview indicated by line 99 in Fig. 8.

Referring by letter to the drawings, A in.- dicates a saw-1nill floorprovided with bearings for the axles of wheels 6 opposingrails c, d, ofcarriage side-beams 1:), one of these rails being in grooveaiit upon theopposing wheels to prevent lateral displz'icement of the carriage. Oneside-beam of the carriage is shown, in Fig. 5, provided with a rack e inmesh with a pinion 7' that is rotated alter nately in oppositedirections by any suitable power to reciprocate said carriage, but othersuitable means may be employed for the same purpose. Fast on the flooraforesaid are cam-tracks g for the purposehereinafter specified.

Normally seated in cross-pieces C of the carriage, flush with the topsof same, and adjacent to knees 7i thereon, are supports 1) havingdepending rack-shanks 2' each engaged by alifting pawl j and a detent7c, the pawl being wristed to a wheel or fast on an arbor E upon whichthe detent is loose, this construction and arrangement of parts beingclearly illustrated in Figs. and (3. The cross-pieces C are intermediateof endpieces F of the carriage and all these transverse portions of saidcarriage are provided with bearings for the aforesaid arbor to which ahandlevcr n is connected. To pro vide for automatic lift of the supports1), at about the time the carriage completes its movement in eitherdirection of travel, a weighted. stem 0 is arranged in rigid connectionwith the arbor E to depend therefrom and have contact with one or theother of the aforesaid cam-tracks. The opposing canutrack swings thestem in a direction to cause a rock of the arbor, the result being liftof the supports D, and there is automatic return of said stem and pawls1' to normal position the detents is serving to hold said supports inadjusted position. When it is desired to lower the supports 1), thepawls 7' and dctents 7c are moved out of ei'lgagenlent with thecorresponding rack-shanks of said supports, whereby these supports areper mitted to drop of their own gravity. A sawmill set-works may beemployed in eonncc tion with the arbor E aforesaid.

In pivotal support 011 upper bosses of the carriage cross-pieces C arebell-crank levers having arms (j thereof in. pivotal connection with atable G, other arms r of these levers being provided with supportingstuds 3 for the table. Auxiliary arms 6 of said bell-crank lovers areconnected by a link-rod a, and one of these arms is connected by aflexible runner 4), such as a cable, with a weight H, a pulley w beingprovided for the support of said runner. A. handle so is shown inconnection withone of the aforesaid levers to facilitate manipulation ofthe table against resistance of the weight H, and stops y y arerespectively arranged in the path of the lever arm 2, and anotherleverarm 2 to provide for automatic swing of said table againstresistance of said weight, it being understood that in practice thearrangement of said stops will be such as to cause a swing of the tablefor a limited distance at a predetermined time previous to that at whichthe carriage completes its movement in either direction of travel.

When in the adjusted position shown by dotted lines in Fig. 1, and fulllines in Fig. 7, the table serves as means for chucking the material tobe sawed on the supports 1) against the knees /L aforesaid below thecutting plane of the saw I, the chucking being automatic because of theweight H, it re quiring a slight outward swing of said table to unchucksaid material preliminary to a lift of same as the result of a manual orautomatic rock of the arbor E aforesaid. its a matter of detail, thetable is preferably provided with a depending flange parallel to theaforesaid knees. hen the table is adjusted over the carriage, as bestshown in Figs. 1 and i it serves as a support'for the material to becut, and suspended in depending bearing ears of said table are shafts J,K, for sprocket-wheels Z), c res 'iectively. The wheels I) are fast onthe shaft J, and the shaft K has spline-engagement with all but themiddle one of the wheels 0, this middle wheel being loose on said shaftK that of itself is loose in a depending bracket cl of the tableadjacent to a spur-gear hubextension of said loose sprocket-wheel. Looseon the shaft K, adjacent to one side of the bracket (Z, is a spur-pinion6 having a clutch-hub for the engagement of a clutch 7' fast on saidshaft. The pinion meshes with a spur-wheel g fast on a spindle it thatturns in said bracket. Another spurpinion z" is fast on said spindle inmesh with the spur-gear hub-extension j of the sprocket-wheel c that isloose on the shaft K, whereby this sprocket-wheel is backgeared. Theshaft K is provided with a crank K by which it is manually rotated, andcertain of the bearing-ears and the bracket aforesaid are the means bywhich the sprocket-wheels 0 are prevented from having playlongitudinally of said shaft.

Each of a series of link belts h engage opposite sprocket-wheels b, c,and the backgear aforesaid is such that the middle belt of the serieshas about one-half the speed of the other belts when all these belts arein motion in the same direction, the shaft K being then in clutch withthe main pinion of said gear and in rotation. Each link-belt is providedwith a spur, the one m of the slow belt being opposite the spurs n ofthe other belts. Hence when material to be sawed is placed on the tableit is readily clutched by the spurs aforesaid, as a result of turningthe shaft K for the time being in clutch with the main pinion of thebackgear aforesaid, the chucking being done below the cutting plane ofthe saw.

The material above the cutting plane of the saw is caught and chucked bynormally parallel tooth-bars L that are shown in Fig. 1, connected attheir ends by set-screws 0" with cranks 0 of vertical spindles 79 forwhich end-pieces F of the carriage are provided with bearings. Lowercranks f of the spindles are connected in pairs by links '1", and leverss of said spindles are connected by flexible runners 7;, such as cables,with weights M, pulleys it being provided for the support of saidrunners. 13y chucking the material above the cutting plane of the sawwith the toothed bars aforesaid, said bars serve as supports for saidmaterial and thus prevent the same from dropping on said saw. The bars Lare slotted at one end to provide for adjustable connection with theadjacent cranks o, and said bars are uncoupled from said cranks whenevernecessary to place a saw.

()no of the spindles p is provided with a supplementary lever v, and thebars L and parts in connection therewith are shown as they would appearadjusted for the chuck ing of straight material parallel thereto on thetable, the weights M serving to cause a draw of said bars toward oneanother, whereby provision is bad for automatic chucking of material ofvarying thickness. To provide for automatic adjustment of the toothedbars to chuck material more or less tapered or not disposed on the tableparallel to the normal disposition of said bars, the set-screw in theslot at one end of each bar is loosened.

After a cut in eithen direction, the material above the cutting plane ofthe saw is supported by the toothed bars L and the shaft K is rotated inthe proper direction, out of clutch with the back-gear aforesaid, todischarge the cut piece of said material from the table below said planeof the saw. The bars L being retracted, the material previouslysupported by the same is dropped upon the table for another cut, saidmaterial being again chucked as aforesaid.

To provide for automatic retraction of the toothed bars from opposingmaterial stop 10 may be provided in the paths of the levers s and thelever 02, the disposition of these steps being such, in practice, thatthe unchucking of said material by said bars occurs at about the timethe carriage completes its movement in either direction of travel. A cuthaving been effected and the material unclnickcd, said material iselevated with its supports D and rechucked for another cut, the previouscut piece of lumber being left in place or removed, as may be mostconvenient.

The wheels N for the saw have their arbors O mounted in bearingsprovided on suitably arranged arches P one of which is shown in Fig. 8,and any suitable means may be employed to drive said saw.

The table aforesaid being approximately in the position shown in Figs. 7and 9, material thereon, chucked below the saw, and material on thesupports D chucked by said table against the knees h on the carriage andby the toothed bars aforesaid may be cut when said carriage is run ineither direction.

In Fig. 8, the cranks and links 1" shown in F 1, are omitted, and eachspindle is shown provided with a lover a connected to a runner I," thatin turn com'ieeted to a weight (not shown) similar to the weight M insaid .liig. 11,. A hand-lever o is shown in connection with each of thespindles p at one end of the machine. Like in Fig. l, the toothedchucking-bars L L in Fig. 8, are connected to cranks 0' of the spindlesp, and the general construction and arrangement of the aforesaid movableparts in said Fig. 8, is such that said bars have a floating motion toaccoinmoda-te themselves to material of varying thickness, when the sameis chucked between the knees /a, of the carriage and the table (l belowthe cutting plane of the saw, said material. being at rest on thevertical supports 1) and lied upward from time to time by an adjustmentof said supports as above specified.

I claim:

1. In a horizontal band-saw machine, the saw, a reciprocative carriage,log supports movable in the carriage, means for automatic verticaladjustment of the supports subsequent to a sawing operation, andhand-lever and power-controlled automatically adjustable chuckingdevices for the log longitudinally of same, the chucking being undercontinuous pressure during a sawing operation.

2. In a horizontal band-saw machine, the saw, a reciprocative carriage,log supports movable in the carriage, means for automatic verticaladjustment of the supports subsequent to a sawing operation, andhand-lever and power-controlled automatically adjustable chuckingdevices for the log longitudinally of same above and below the cuttingplane of the saw, the chucking being under continuous pressure during asawing operation.

3. In a horizontal band-saw machine, the saw, a reciprocative carriageprovided with vertically adjustable supports for the material to besawed, and lever-and-power controlled toothed chucking-bars inconnection with the carriage above the cutting plane of the saw to haveat iton'iatic conformity to the longitudinal shape and the position ofsaid imiterial during a sawing operation.

at. In a horizontal band-saw machine, the saw, a reciprocative carriageprovided with vertically adjustable supports for the material to besawed, toothed chucking-bars in automatically adjustable connection withthe carriage above the cutting plane of the saw and automaticallycmilormable under continuous pressure to the longitudinal shape and theposition of said material during a sawing operation, and means forautomatic predetern'iined retraction of the chuck-bars.

5. In a horizontal band-saw machine, the saw, a reciprocative carriage,log supports in vertically adjustable connection with the carriage, anda table in bell-crank connection with said carriage to chuck material onthe supports against carriage-knees.

(S. In a horizontal band-saw machine, the saw, a reciprocative carriage,a table in bellcrank connection with the carriage, means in connectionwith the table for chucking material to be sawed thereon below thecutting plane of the saw and for removing sawed material, and means inconnection with said carriage for chucking said material to be sawedabove said plane of the saw.

7. In a horizontal band-saw machine, the saw, a reciproeative carriage,a table in pivotally adjustable connection with the carriage to be swungover the same or to one side thereof, means in connection with the tablefor chucking material to be sawed thereon below the cutting plane of thesaw, and means in connection with said carriage i'or chucking saidmaterial above said plane of the saw when the table is in position overthe aforesaid carriage.

S. In a horizontal band-saw machine, the saw, a reciprocative carriageprovided with side knees, a table in pivotally adjustable connectionwith the carriage to be swung over the same or to one side thereof,verti cally adjustable supports in connection with said carriage formaterial to be sawed, means for tensioning the swing-table against saidmaterial between it and said knees to chuck said material, and means inconnection with said table for independent chucking of material to besawed thereon.

9. In a horizontal band-saw machine, the saw, a reciprocative carriageprovided with side knees, a table in pivotally adjustable connectionwith the carriage to be swung over the same or to one side thereof,automatic vertically adjustable supports in connection with saidcarriage for material to be sawed, means for exerting constant pressureof the swung out table against said material between it and said kneesbelow the cutting plane of the saw, means in connection with theaforesaid carriage for automatic chucking and supporting the aforesaidmaterial above said plane of the saw, and means in connection with saidtable for independent chucking of material to be sawed thereon andautomatic discharge of the sawed material therefrom.

10. In a horizontal band-saw machine, the saw, a reciproeative carriage,log supports movable in the carriage, means for vertical adjustment ofthe supports to regulate their distance from said saw, means inconnection with the carriage for chucking said material below thecutting plane of the saw, link-connected bell-cranks also in connectionwith the carriage, parallel toothed chucking-bars in connection with thebell-cranks to engage the aforesaid material above the plane of the saw,and means for operating said cranks.

1]. In a horizontal band-saw machine, the saw, a reciprocative carriage,log-supporting mechanism movable in the carriage, means for effecting anautomatic elevation of said mechanism at about the time the carriagecompletes its travel in either direction, means for independent chuckingof material to be sawed above said saw, and means for automatic releaseof the sawed material.

12. In a horizontal band-saw machine, the saw, a reciprocative carriage,log-supporting mechanism movable in the carriage, means for chucking thelog on said mechanism, means for effecting elevation of the aforesaidmechanism to regulate the thickness of material to be cut from said logby said saw, means for independent chucking of said material above theaforesaid saw longitudinally thereof under continuous pressure during asawing operation, means for automatic unchucking of the aforesaid logand elevating adjustmentof its supporting mechanism at about the timethe said carriage completes its travel in either direction, and meansfor automatic release of the sawed material.

In testimony that I claim the foregoing I have hereunto set my hand atAshland, in the county of Ashland and State of Viscousin, in thepresence of two witnesses.

DONALD A. KENNEDY.

itnesses CLARENCE DENNIS, F. J. CoLIGNoN.

